From: Andrew Morton <akpm@linux-foundation.org>
To: David Rientjes <rientjes@google.com>
Cc: Rik van Riel <riel@redhat.com>, Nick Piggin <npiggin@suse.de>,
Oleg Nesterov <oleg@redhat.com>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
linux-mm@kvack.org
Subject: Re: [patch 10/18] oom: enable oom tasklist dump by default
Date: Tue, 8 Jun 2010 14:13:42 -0700 [thread overview]
Message-ID: <20100608141342.114156ac.akpm@linux-foundation.org> (raw)
In-Reply-To: <alpine.DEB.2.00.1006061525150.32225@chino.kir.corp.google.com>
On Sun, 6 Jun 2010 15:34:35 -0700 (PDT)
David Rientjes <rientjes@google.com> wrote:
> The oom killer tasklist dump, enabled with the oom_dump_tasks sysctl, is
> very helpful information in diagnosing why a user's task has been killed.
> It emits useful information such as each eligible thread's memory usage
> that can determine why the system is oom, so it should be enabled by
> default.
Unclear. On a large system the poor thing will now spend half an hour
squirting junk out the diagnostic port. Probably interspersed with the
occasional whine from the softlockup detector. And for many
applications, spending a long time stuck in the kernel printing
diagnostics is equivalent to an outage.
I guess people can turn it off again if this happens, but they'll get
justifiably grumpy at us. I wonder if this change is too
developer-friendly and insufficiently operator-friendly.
--
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next prev parent reply other threads:[~2010-06-08 21:14 UTC|newest]
Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-06 22:33 [patch 00/18] oom killer rewrite David Rientjes
2010-06-06 22:34 ` [patch 01/18] oom: check PF_KTHREAD instead of !mm to skip kthreads David Rientjes
2010-06-07 12:12 ` Balbir Singh
2010-06-07 19:50 ` David Rientjes
2010-06-08 19:33 ` Andrew Morton
2010-06-08 23:40 ` David Rientjes
2010-06-08 23:52 ` Andrew Morton
2010-06-06 22:34 ` [patch 02/18] oom: introduce find_lock_task_mm() to fix !mm false positives David Rientjes
2010-06-07 12:58 ` Balbir Singh
2010-06-07 13:49 ` Minchan Kim
2010-06-07 19:49 ` David Rientjes
2010-06-08 19:42 ` Andrew Morton
2010-06-08 20:14 ` Oleg Nesterov
2010-06-08 20:17 ` Oleg Nesterov
2010-06-08 21:34 ` Andrew Morton
2010-06-08 23:50 ` David Rientjes
2010-06-06 22:34 ` [patch 03/18] oom: dump_tasks use find_lock_task_mm too David Rientjes
2010-06-08 19:55 ` Andrew Morton
2010-06-09 0:06 ` David Rientjes
2010-06-06 22:34 ` [patch 04/18] oom: PF_EXITING check should take mm into account David Rientjes
2010-06-08 20:00 ` Andrew Morton
2010-06-06 22:34 ` [patch 05/18] oom: give current access to memory reserves if it has been killed David Rientjes
2010-06-08 11:41 ` KOSAKI Motohiro
2010-06-08 18:47 ` David Rientjes
2010-06-14 11:08 ` KOSAKI Motohiro
2010-06-08 20:12 ` Andrew Morton
2010-06-13 11:24 ` KOSAKI Motohiro
2010-06-08 20:08 ` Andrew Morton
2010-06-09 0:14 ` David Rientjes
2010-06-06 22:34 ` [patch 06/18] oom: avoid sending exiting tasks a SIGKILL David Rientjes
2010-06-08 11:41 ` KOSAKI Motohiro
2010-06-08 18:48 ` David Rientjes
2010-06-08 20:17 ` Andrew Morton
2010-06-08 20:26 ` Oleg Nesterov
2010-06-09 6:32 ` David Rientjes
2010-06-09 16:25 ` Oleg Nesterov
2010-06-09 19:44 ` David Rientjes
2010-06-09 20:14 ` Oleg Nesterov
2010-06-10 0:15 ` KAMEZAWA Hiroyuki
2010-06-10 1:21 ` Oleg Nesterov
2010-06-10 1:43 ` KAMEZAWA Hiroyuki
2010-06-10 1:51 ` Oleg Nesterov
2010-06-06 22:34 ` [patch 07/18] oom: filter tasks not sharing the same cpuset David Rientjes
2010-06-08 11:41 ` KOSAKI Motohiro
2010-06-08 18:51 ` David Rientjes
2010-06-08 19:27 ` Andrew Morton
2010-06-13 11:24 ` KOSAKI Motohiro
2010-07-02 22:35 ` Andrew Morton
2010-07-04 22:08 ` David Rientjes
2010-07-09 3:00 ` KOSAKI Motohiro
2010-06-08 20:23 ` Andrew Morton
2010-06-09 0:25 ` David Rientjes
2010-06-06 22:34 ` [patch 08/18] oom: sacrifice child with highest badness score for parent David Rientjes
2010-06-08 11:41 ` KOSAKI Motohiro
2010-06-08 18:53 ` David Rientjes
2010-06-08 20:33 ` Andrew Morton
2010-06-09 0:30 ` David Rientjes
2010-06-06 22:34 ` [patch 09/18] oom: select task from tasklist for mempolicy ooms David Rientjes
2010-06-08 11:41 ` KOSAKI Motohiro
2010-06-08 21:08 ` Andrew Morton
2010-06-08 21:17 ` Oleg Nesterov
2010-06-09 0:46 ` David Rientjes
2010-06-08 23:43 ` Andrew Morton
2010-06-09 0:40 ` David Rientjes
2010-06-06 22:34 ` [patch 10/18] oom: enable oom tasklist dump by default David Rientjes
2010-06-08 11:42 ` KOSAKI Motohiro
2010-06-08 18:56 ` David Rientjes
2010-06-08 21:13 ` Andrew Morton [this message]
2010-06-09 0:52 ` David Rientjes
2010-06-06 22:34 ` [patch 11/18] oom: avoid oom killer for lowmem allocations David Rientjes
2010-06-08 11:42 ` KOSAKI Motohiro
2010-06-08 21:19 ` Andrew Morton
2010-06-06 22:34 ` [patch 12/18] oom: extract panic helper function David Rientjes
2010-06-08 11:42 ` KOSAKI Motohiro
2010-06-06 22:34 ` [patch 13/18] oom: remove special handling for pagefault ooms David Rientjes
2010-06-08 11:42 ` KOSAKI Motohiro
2010-06-08 18:57 ` David Rientjes
2010-06-08 21:27 ` Andrew Morton
2010-06-06 22:34 ` [patch 14/18] oom: move sysctl declarations to oom.h David Rientjes
2010-06-08 11:42 ` KOSAKI Motohiro
2010-06-06 22:34 ` [patch 15/18] oom: remove unnecessary code and cleanup David Rientjes
2010-06-06 22:34 ` [patch 16/18] oom: badness heuristic rewrite David Rientjes
2010-06-08 11:41 ` KOSAKI Motohiro
2010-06-08 23:02 ` Andrew Morton
2010-06-13 11:24 ` KOSAKI Motohiro
2010-06-17 5:14 ` David Rientjes
2010-06-21 11:45 ` KOSAKI Motohiro
2010-06-21 20:47 ` David Rientjes
2010-06-30 9:26 ` KOSAKI Motohiro
2010-06-17 5:12 ` David Rientjes
2010-06-21 11:45 ` KOSAKI Motohiro
2010-06-08 22:58 ` Andrew Morton
2010-06-17 5:32 ` David Rientjes
2010-06-06 22:34 ` [patch 17/18] oom: add forkbomb penalty to badness heuristic David Rientjes
2010-06-08 11:41 ` KOSAKI Motohiro
2010-06-08 23:15 ` Andrew Morton
2010-06-06 22:35 ` [patch 18/18] oom: deprecate oom_adj tunable David Rientjes
2010-06-08 11:42 ` KOSAKI Motohiro
2010-06-08 19:00 ` David Rientjes
2010-06-08 23:18 ` Andrew Morton
2010-06-13 11:24 ` KOSAKI Motohiro
2010-06-17 3:36 ` David Rientjes
2010-06-21 11:45 ` KOSAKI Motohiro
2010-06-21 20:54 ` David Rientjes
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